Lamp holder



FIG. 1 is a front, top, left side perspective view of the lamp holder showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side-elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right side-elevational view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a lamp holder, as shown. 